<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag type="info">excel模版说明</el-tag>
        <el-tag>
          <i class="el-icon-download"/>
          <a :href="'/static/课程分类模板.xlsx'">点击下载模版</a>
        </el-tag>
      </el-form-item>
      <el-form-item label="选择Excel">
        <el-upload
          ref="upload"
          :auto-upload="false"
          :on-success="fileUploadSuccess"
          :on-error="fileUploadError"
          :disabled="importBtnDisabled"
          :limit="1"
          :action="BASE_API+'/eduservice/subject/addSubject'"
          name="file"
          accept="application/vnd.ms-excel">
          <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
          <el-button
            :loading="loading"
            style="margin-left: 10px;"
            size="small"
            type="success"
            @click="submitUpload">上传到服务器</el-button>
        </el-upload>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
import teacher from '@/api/edu/teacher'

export default {
    data() { // 定义变量和初始值
        return {
            BASE_API: process.env.BASE_API, // 接口API地址
            importBtnDisabled: false, // 按钮是否禁用,
            loading: false
        }
    },
    created() { // 页面渲染之前执行，一般调用methods中定义的方法
    },
    methods: { // 创建具体的方法，调用teacher.js中定义的方法
        // 点击按钮上传文件
        submitUpload() {
          this.importBtnDisabled = true
          this.loading = true
          this.$refs.upload.submit()
        },
        // 上传成功
        fileUploadSuccess() {
          this.loading = false
          this.$message({
            type: 'success',
            message: '添加课程分类成功'
          })
          this.$router.push({path: '/subject/list'})
        },
        // 上传失败
        fileUploadError() {
          this.loading = false
          this.$message({
            type: 'error',
            message: '添加课程分类失败'
          })
        }
    }
}
</script>